A logarithmic scale is defined as one where the units on an axis are powers, or logarithms, of a base number, usually 10. It is particularly useful when we need to represent large, exponential changes in information on that axis. A semi-log chart is one in which one axis (x or y) is converted to a logarithmic scale.
Definition of âChristmas diseaseâ - English Dictionary. See all translations. uk â /ËkrÉªs.mÉs dÉªËziËz/ us â /ËkrÉªs.mÉs dÉªËziËz/ specialized. âº also haemophilia B a genetic disease in which there is not enough of a substance called factor IX in the blood, so that the person cannot stop bleeding after an injury. (Definition of âChristmas diseaseâ from the Cambridge Advanced Learner's Dictionary & Thesaurus Â© Cambridge University Press)
tree view | thumbnails | slideshow. In 1894 a New Orleans physician, Dr. Isadore Dyer, and five leprosy (Hansen's Disease) patients were carried by coal barge in the middle of the night from an old warehouse(Perdido and Jefferson Davis Parkway) up the Mississippi River to Carville, Louisiana, to an old plantation where patients could be cared for.